Piano-stool.



E. SCHWARZ.

PIANO STOOL.

APPLICATION FILED JULY u, 191s.

Patented, Oct. 13, 1914.

ffl-15' Wag/@gaa if# ff g /47'T0/P/VEY Abm/[5556 UNITED STATES PATENT OFFICE.

1er/[ERICH SCHWARZ, or CHICAGO, immers, Assroivonor ONE-HALF To ARTHUR n.

SANDER, OF CHICAGO, ILLINOIS.

PIANO-s211001..

Specification of Letters Patent. y

Patented Oct. 13, 1914.

Application led July 11, 1913. Serial No. 778,577.

To all whom t may concern.'

Be it known that I, Eri/[ERICH SCHWARZ, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Piano-Stools, of which the following is a specification.

The essential object of this invention is to provide a piano stool containing a seat which can be raised or lowered, and which, when raised, will be in inclined position.

In the drawings, Figure 1 is a front ele vation of a piano stool embodying the invention; Fig. 2 is an end elevation taken at right angles to Fig. 1; Fig. 3 is a front elevation of a stool with a modified form of Operating mechanism; Fig. 4 is an end elevation of the form shown in Fig." 3; and Figs. 5 and 6 are views at right angles to each other of parts of the operating mechanism.

The stool comprises the longitudinal members 1 and cross members 2, suitably supported by legs 3. The seat 4 is adapted to rest, when in lowered position, upon the rectangular frame composed of members 1 and 2, and when in elevated position, to be supported from said members by the operative mechanism hereinafter described. To the seat 4 the angle irons 5 are secured, being slotted at 6, and pins 7 secured to the frame members 1 or 2, ride in slots 6, and in this manner the movement Of the seat 4 is guided and limited. In the preferred form of the invention the seat 4 is elevated by moving the lever 8 from full line position, Fig. 2, to dotted line position. Rigidly secured to said lever 8 isa metallic band or strap 9 which extends from end to end of the stool, and the ends of strap 9 are received within the sector-shaped perforations 10 in the plates 11, which plates aresecured to the cross members 2. The lower righthand edge, Fig. 5 of the strap 9 seats in the crotch 12 of the perforation 10, which crotch serves as a fulcrum upon which the plate or strap 9 can move, and a link 13 connects the lever 8 to an arm 14, which arm 14 is connected to a second strap 9 on the right side, Fig. 2. y

If the lever 8 be moved from full line position, Fig. 2, toward the dotted line position, the upper end of said lever will engage the under surface of the seat 4, and at the same time the end of the arm 14 will also engage the under surface of the seat, and as the lever 8 and arm 14 move from the oblique to or toward the vertical positions, the seat will be elevated. The distance from the bearing edge of the right-hand strap 9 to the end of the arm 14 is slightly greater than the distance from the left-hand strap 9 to the end of the lever 8; hence, when the parts have assumed` the vertical position, Fig. 2, the right-end of the seat 4 is raised higher `than the left end. Since the seat is usually made of wood, it is desirable to place a metal strip or 4reinforcement 15 upon its under surface in order to prevent abrasion of the seat by the members 8 and 14.

In Figs. 3 and 4 a modification is shown in which the straps 9 are turned toward each other and are adapted to rotate in opposite directions instead of rotating in unison, as in the other form of the invention. The straps 9 are secured to links 16, one of which is a little longer than the other. Pivoted to link 16 at 17 are pitmen 18, which members 18 are pivoted together at 19. One member 18 carries an ear 20 bent at right angles to the rest of the member, andto this depending ear 20` the link 21 is pivoted. The bell-crank lever 22 is pivoted at 23 to the bracket 24 which depends from the rectangular frame. The right side of said bellcrank 22 is adapted to be engaged by the operator and forced toward the left, Fig. 3, and since left arm of the bell-crank is pivoted at 25 to the link 21, it is obvious that to push the bell-crank 22 in one direction will elevate the seat; whereas to move it in thel opposite direction will lower the seat.

It will be observed that in the form shown in Figs. 1 and 2 there is but one lever 8, and in the form depicted in Figs. 3 and 4 but one bell-crank lever 22. The bands or straps 9 which are thus actuated at one end only, same being the right end, Figs. 1 and `3, carry suitable arms 26 at the opposite ends, which arms are rotated in accordance with the rotation of the bands 9 and which bear upon and support the left end of the seat 4. The bands 9 merely project into and through slots in the members 8, 14, 16, and 26, thus dispensing with the necessity for set-screws or similar appliances which would be required if a round bar journaled in an ordinary bearing were used in place of the flat strap or straps 9..

It will further be obvious that sundry changes in the details of constructionl and' thereby, one edge of the stop resting in the arrangement ofparts may be made Without crotch of said openings, and arms carried departing froml the soope oftheinvention. 'by thestraps and in engagement with the I claim as my invention: V 4seat aforesaid. 35 o The combination with a frame of a seat In testimony Whereol I hereunto aiix my movable with respect thereto, a plurality signature in the presence of two witnesses. of plates secured to said frame, each plate having a seet'oreshaped opening, a movable i EMERICH SCHWARZ' strap interposed between each pair of plates` Witnesses:

1^ and extending into the sector-shaped open- ROBT. KEOTY,

ings thereof, and arranged to be guided DAVID B. JOHNSON.

Copies-offthisfpatent may be obtained for ve'centseaeh; b'yaddressiug the Gommissionerv of Patents,

` Washington, D.; 03. 

